| General | |
|---|---|
| Manufacturer | Amazfit (Zepp Health) |
| Type | Rugged outdoor GPS smartwatch |
| Series | T-Rex |
| Released | 6 September 2024 |
| Price at launch | GBP 279 / USD 279.99 |
| Predecessor | T-Rex 2 |
| Successor | T-Rex 3 Pro. See Release Radar. |
| Sizes | 48.5mm (medium) |
| Colours | Onyx, Lava, Haze Gray |
Specifications and features as at launch.
Jump to: Expert opinion | What’s new | Specifications | Battery life | Features | Activity profiles | Quick answers | Further reading
Expert opinion
The T-Rex 3 is a rugged outdoor smartwatch with military-grade durability, excellent battery life, offline maps, and dependable navigation. Its AMOLED touchscreen is notably smooth compared with competitors, and the interface is intuitive.
GPS scored 85% on the standard 10-mile test, good by 2024 standards but not class-leading. Optical heart rate requires a chest strap for reliable zone training, and running power read consistently high in testing. Loading GPX routes is cumbersome, with no built-in links to Strava, Komoot or Ride with GPS. The lens is Gorilla Glass rather than sapphire, protected by a raised bezel.
What’s new versus the T-Rex 2
Hardware
- Larger 1.5 inch AMOLED display, up from 1.39 inch
- Resolution raised to 480 x 480, from 454 x 454
- Peak brightness of 2,000 nits
- Larger 700 mAh battery, up from 500 mAh
- Microphone added
- NFC added for Zepp Pay
- Music storage added
- Freediving certification to 45 metres
- Wi-Fi 2.4GHz and Bluetooth 5.2
Software
- Zepp OS 4.0, with later updates to Zepp OS 4.5
- Zepp Flow voice control
- Offline maps with turn-by-turn navigation
- HYROX race and PFT modes (added by firmware)
- Readiness
- Strength training with 25 auto-recognized exercises
Specifications
| Display | |
|---|---|
| Size | 1.5 inch |
| Type | AMOLED |
| Resolution | 480 x 480 pixels |
| PPI | 322 |
| Peak brightness | 2,000 nits |
| Lens | Gorilla Glass |
| Touchscreen | Yes |
| Physical | |
| Case size | 48.5mm (medium) |
| Thickness | 13.75mm |
| Weight | 68.3g (without strap) |
| Case material | Stainless steel bezel, polymer middle frame |
| Water rating | 10 ATM, freediving to 45m (EN13319, ISO 6425, GB/T 18828) |
| Durability | Military standard (report H202406062670-01EN) |
| Strap width | 22mm |
| © the5krunner. Link required. | |
| Sensors and positioning | |
| GPS | Dual-band, six satellite systems |
| Heart rate | BioTracker 6.0 PPG (supports blood-oxygen) |
| Other sensors | Barometric altimeter, geomagnetic, gyroscope, acceleration, temperature, ambient light |
| Connectivity and storage | |
| Connectivity | Wi-Fi 2.4GHz, Bluetooth 5.2 BLE, NFC (Zepp Pay) |
| Storage | Up to 26GB usable for maps, music and data |
| Music | Onboard MP3 storage, playback via Bluetooth headphones |
Battery life
| Mode | Battery life |
|---|---|
| Typical use | Up to 27 days |
| Heavy use | Up to 13 days |
| Battery saver | Up to 40 days |
| Clock mode | Up to 81 days |
| Accurate GNSS | Up to 42 hours |
| Power Saving GNSS | Up to 72 hours |
| GNSS Long Battery Life | Up to 114 hours |
| GNSS Max Battery Life | Up to 180 hours |
| © the5krunner. Link required. | |
| Low temperature (GNSS on) | Up to 28 hours |
| Low temperature (GNSS off) | Up to 32 days |
The 700 mAh cell charges via a magnetic base in around three hours. GNSS Long Battery Life and Max Battery Life work only within Hiking and Climbing modes. A USB-C cable is required and not supplied.
Features
Plan
- Zepp Coach adaptive training plans, 3K to marathon
- Offline maps with contour lines and ski maps
- Turn-by-turn navigation and off-route alerts
- Route import and direct return navigation
- Save location points
- Readiness
- Sleep, blood-oxygen and stress monitoring
- Menstrual cycle tracking
Prepare
- Running power
- VO2 Max and real-time performance
- Training load and training effect
- PeakBeats workout status
- PAI health assessment
- Heart rate belt, running power meter and cycling sensor pairing
Perform
- 177 sports modes
- HYROX race and PFT modes
- Freediving to 45 metres with depth and water temperature
- Strength training with 25 auto-recognized exercises
- Track Run mode with smart trajectory correction
- Virtual pacer
- Environment tools: compass, barometer, altitude, storm alerts, sun and moon, tide
Connect
- Zepp Flow voice control and speech-to-text replies (Android)
- Zepp Pay contactless payments
- Sync to Strava, adidas Running, Komoot, Relive, Google Fit, Apple Health
- Smart notifications
- Sonos control
- Find My Phone
Activity profiles
| Category | Profiles |
|---|---|
| Running | Outdoor running, Treadmill, Walking, Trail running, Indoor walking, Race walking, Track run, Ultramarathon |
| Cycling | Outdoor cycling, Indoor cycling, Mountain biking, BMX, E-Bike, E-MTB, Gravel cycling, Bicycle commuting, Bicycle touring, Road cycling, Cyclocross |
| Swimming | Pool swimming, Open water swimming, Fin swimming, Artistic swimming |
| HYROX | HYROX race |
| Gym and fitness | Elliptical, Rowing machine, Stair-climbing machine, Stair stepper, Spinning, Indoor fitness, Mixed aerobics, Cross-training, Aerobics, Group calisthenics, Body combat, Strength training, Step training, Core training, Flexibility training, Free training, HIIT, Yoga, Pilates, Gymnastics, Horizontal bar, Parallel bars, Battling ropes, Stretching, Bouldering, Indoor rock climbing, Boxing, Wrestling, Martial arts, Tai Chi, Muay Thai, Judo, Taekwondo, Karate, Kickboxing, Fencing, Jiu-Jitsu, Kendo |
| Outdoor | Climbing, Hiking, Orienteering, Rock climbing, Fishing, Hunting, Skateboarding, Roller skating, Parkour, ATV, Offroad motorcycle |
| Other | Diving: Outdoor freediving, Indoor freediving, Spearfishing. Winter sports: Skiing, Snowboarding, Downhill skiing, Cross-country skiing, Ski orienteering, Biathlon, Outdoor skating, Indoor skating, Curling, Bobsleigh and tobogganing, Sledding, Snowmobile, Snowshoeing. Water sports: Outdoor boating, Sailing, Kayak, Rowing, Dragon boat, Paddleboarding, Indoor surfing, Tubing, Water skiing, Snorkeling, Kitesurfing, Surfing, Wakesurfing. Extreme sports: Skydiving, Paragliding, Wingsuit flying. Ball sports: Soccer, Basketball, Volleyball, Tennis, Badminton, Table tennis, Golf swing, Pickleball, Cricket, Rugby, Hockey, and others. Dance: Zumba, Ballet, Street dance, Latin dance, and others. Other: Jumping rope, Archery, Equestrianism, Driving, Stair climbing, Triathlon, Multisport. |
Quick answers
When was the Amazfit T-Rex 3 released?
Amazfit released the T-Rex 3 on 6 September 2024. The launch price was GBP 279 or USD 279.99.
Is the T-Rex 3 waterproof?
T-Rex 3 has a water rating of 10 ATM and is certified for freediving to 45m, recording depth and water temperature.
Does the T-Rex 3 have maps?
Yes, T-Rex 3 has offline maps with contour lines and ski maps, plus turn-by-turn navigation and off-route alerts.
What is the T-Rex 3 battery life?
Amazfit rates T-Rex 3 at up to 27 days of typical use and up to 42 hours in Accurate GNSS mode. GNSS Max Battery Life reaches 180 hours, but works only within Hiking and Climbing modes.
Does the T-Rex 3 have music?
Yes, T-Rex 3 has onboard MP3 storage with playback through Bluetooth headphones, and up to 26GB of usable storage for maps, music and data.
What size and weight is the T-Rex 3?
T-Rex 3 has a 48.5mm case, is 13.75mm thick and weighs 68.3g without the strap. It takes a 22mm strap and has a 1.5 inch AMOLED display.
Further reading
- the5krunner T-Rex 3 review
- Amazfit watch specifications
- HYROX sports technology guide
- Release Radar: upcoming watches
Related watches
Looking at alternatives to the T-Rex 3?
- Buy the T-Rex 3: Amazfit T-Rex 3.
Small things I always use
- Garmin 90-degree charging adapter: Charges your Garmin from any USB-C cable. Essential when travelling. I use one.
- Body Glide: The blue anti-chafe stick swimmers and runners carry. I use it.
- Speedo earplugs: Fewer ear infections and no cold-water dizziness. I use them.
- Dryrobe Advance: My winter changing robe for open-water swims. I use one. A cheaper option is the AONYIYI changing robe.
- Maurten: Race fuel that stays easy on the stomach. I use them.
- Beet It Sport nitrate shots: Beetroot shots I take in the days before a race. I use them.
- Garmin charging puck: The quickest way to top up before a session. I use one.
- Injinji: Toe socks that stop rubbing, so you run more. I use them.
- Ultimate toe protectors: Stop black toenails on long runs. They work. I use them.
- Compressport R2 v2 calf sleeves: My calf sleeves of choice. I use them.
- Cellucor C4: My pre-workout before hard sessions.
- TPU tubes: Schwalbe Aerothan, Tubolito and Pirelli SmarTube. Light, tiny spares. I use all three.
- G8 insoles: Adjustable insoles that are good. I use them.
- Cycplus Cube: A 97g electric pump that gets a road tyre rideable in two minutes. I carry one. 5% off with code THE5KRUNNER.
Watches and sensors
- Polar H10: My daily driver for waking HRV.
- Polar Verity Sense: My backup arm-worn HR sensor.
- Nomad bedside charger: Charges my iPhone and Apple Watch overnight. I use it, and many of their bands.
- Train.Red: The best muscle oxygen sensor I’ve used.
- Tymewear: Accurate heart rate and reliable ventilatory zones. I use it to pace endurance rides over an hour.
- Garmin Forerunner 970: A pro-grade triathlon watch. I use this.
- Apple Watch Ultra 4: My daily smartwatch. No phone needed on rides.
- Garmin Fenix 9 Pro: I’ve just bought one.
On the bike
- Continental GP5000 for everyday riding, and Aero 111 on the front for special occasions.
- Helmets: Specialized S-Works Evade 3 for road riding, and Rudy Project Wing for TT-style races. I use both.
- Ravemen FR300: A front light that mounts under your Garmin or Wahoo. I use one.
- Wahoo TRACKR Radar: I use it on one bike and Varia on the other. They perform the same.
- Garmin Varia RTL515: Radar that warns you of cars from behind. I use this model.
- Wahoo ELEMNT Roam 3: The bike computer that’s easy to use. I use mine on most rides.
- Favero Assioma Pro RS2: Accurate power pedals that swap easily between bikes. I use this model.
Home and indoor training
- NPE Runn: Makes my basic treadmill smart, sending more accurate speed and distance to my watch and Zwift. I use it.
- Google Wifi: Keeps Zwift connected in my pain cave. I use it.
- Apple TV 4K: Zwift on the big screen. I use two.
- Google Nest Doorbell (wired, 2nd gen): My video doorbell, running in both Google Home and Apple Home. I use it.
Health, recovery and sleep
- FreeStyle Libre 3 Plus: Shows how my blood sugar responds to diet.
- hDrop: Measures my sweat loss in summer and indoors.
- Fourth Frontier Zone: Checks my heart under load in hard sessions.
- Oura Ring 5: My partner’s recovery tracker of choice.
- Eight Sleep: A cooling mattress cover my partner and I use nightly.
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